Lock.



W. J. CARROLL.

. LOCK.

AYPLIQATION FILED D30. '1, 1908. 1,032,530. Patented July 16, 1912.

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DNTTED NTATEN PATEN T UFFTD.

WILLIAM J'. CARROLL, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT &COM- PANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK.

' Specification of Letters Patent.

Patented July 16, 1912.

Application filed December 7, 1908. Serial No. 466,405.

To all whom it may concern:

Be it known that I, WILLIAM J. CARROLL, of the city and county of NewHaven and State of Connecticut, have invented new and usefulImprovements in Locks, of which the following is a full, clear, andexact description, when taken in connection with the accompanyingdrawings, which form apart thereof.

This invention relates to locks, and has for its object the productionof a lock which will be effective in its operation and have certainadvantages hereinafter pointed out.

One of the objects of the present invention is to provide a lock, thelatch bolt of which may be dead locked from within or without at night,or at such other times as may be desired. A key, however, is providedwhich will not only retract the latch from the outside under normalconditions, but will also retract it when thus dead locked. I

To this and other ends, the invention consists of the improvements andcombinations of parts set forth and claimed hereinafter.

Referring to the drawings, Figure 1 represents a side elevation of alock embodying the invention. In this view, the cap plate on the top oroutside of the lock has been removed, and the bit of the outsidecylinder is indicated in dotted lines. Fig. 2 is a similar view with theparts shown in the position occupied when the latch bolt is dead locked,and one part of the divided hub removed, Fig. 3, a similar view, withthe parts shown in another position in which the latch bolt is beingretracted by the key from the outside, Fig. 4, a reverse view of theparts as shown in Fig. 1, Fig. 5, a front edge view in detail of thedivided hub, Fig. 6, a view of the inside. cylinder from the inside ofthe lock case, and Fig. 7, a view of the inside cylinder from withoutthe lock case.

In all figures, similar letters of reference represent likeparts.

Referring to the drawings, the parts designated by the letter Arepresent the casing of a lock, B its faceplate, and C the latch bolt,which is normally held in the protracted position shown in Figs. 1 and 2by means of the lever D, which is pivoted on the post E on a slidingyoke M, and has its free end F bear on the rear of the T-shaped end G ofthe latch bolt C. A spring I-I, secured to the casing, and the lever Dholds the parts yieldingly in their protracted position.

I and J represent two parts of a divided hub of well known construction,the wings K of the hub being adapted to engage shoulders L on thesliding yoke M, which has a lug M adapted to engage the "IT-shaped end Gof the latch bolt 0 to retract it.

N indicates in dotted lines the bit of the cylinder on the outside ofthe lock case (not otherwise shown). This bit N is adapted when turnedin the direction of the arrow (Figs. 1 and 3) to engage one arm, such asO, of a bell crank lever P pivoted on a post Q in the casing anclhe'ldnormally in the position shown in Fig. 1 by means of a spring R. Theother arm S of the bell crank lever P is adapted to engage one end of alever T pivoted at U to the casing. The other end of the lever T isadapted to engage the T-shaped end G of the latch bolt 0 to retract thesame.

A dead locking lever V is pivoted at W to the casing, and has an arm Xwhich when the lever is swung into the position shown in Fig. 2 fallsbehind the T-shaped end G of the latch. bolt C and prevents theretraction of the latch bolt. The other arm of the dead locking lever Vis provided on its under side with a pin Y adapted to take into a slot Zin a plate A secured by means of screws B or otherwise to the cylinder Don the inside of the lock case. By turning the cylinder D the deadlooking leverV will be moved by the plate A to or from the positionshown in Fig.2 as may be desired.

When the dead locking lever V is in the position shown in Fig. 2, it maybe rotated on its pivot to release the latch bolt C by means of thatportion J of the divided hub which is operated from the inside becauseone wing K of the part J is adapted to engage a depending projection Eon the lever V (Fig. 2), so that when the part J is r0- tated in thedirection of the arrow (Fig. 2) it will swing the lever V so that itsarm X will be moved out of engagement with the rear end of the latchbolt 0. I

When the bit N of the cylinder lock which is operated from the outsideof the door is turned in the direction of the arrow (Fig. 3) so that itwill engage the bell crank lever P to retract the latch bolt, the bellcrank lever P will rotate an intermediate lever F pivoted at U to thecasing by means of a depending lug G on the under side of the bell cranklever P. the intermediate lever F is adapted to take into a notch II onthe dead locking lever V, so that when the intermediate lever F is swungby the bell crank lever P, it in turn will swing the lever V to move thearm X from engagement with the rear end G of the latch bolt C. On theother hand, when the -bit N of the outside cylinder is rotated in thedirection of the arrow (Fig. 2) it will engage the upper end of the deadlocking lever V so as to rotate it from the position shown in Fig. 1 tothat shown in Fig. 2, wherein the arm X is in position to prevent theretraction of the latch bolt. By this construction, the latch bolt maybe dead locked from the inside of the lock through the inside cylinderD. It may be dead locked from the outside of the look by means of thebit N of the outside cylinder.

The latch bolt when dead locked may be released from the inside eitherthrough the inside cylinder D or through the part of the hub J operatedby the inside knob. The latch bolt when dead locked may also beretracted through the bit of the outside cylinder.

Having now described my invention (which may vary in its details withoutdeparting from the spirit thereof), what I claim and desire to secure byLetters Patent, is

1. In a latch, the combination with a knob on the inside for retractingthe latch bolt; of a latch bolt yieldingly held in its protractedposition; means for deadlocking said bolt in such position adapted to bebrought in or out of operative relation with said latch bolt; means foractuating said deadlocking means from either side of said lock to orfrom its operative posit-ion; and means for releasing said deadlockingmeans through said inside knob, substantially as described.

2. In a latch, the combination with a knob on the inside for retractingthe latch bolt; of a latch bolt yieldingly held in its protractedposition; means for deadlocking said bolt in such position; means foractuating or releasing said deadlocking means at will from the inside ofsaid latch; mechanism The other end of actuated by a key from theout-side of said latch for actuating. or releasing said deadlockingmeans; and means for releasing said deadlocking means from said insideknob, substantially as described.

3. In a latch, the combination with a latch bolt; of a deadlocking leveradapted to be swung to and from the path of said latch bolt; a cylinderlock adapted to actuate said "lever to either of its positions andadapted to retract said latch bolt from one side of said latch; knobmechanism adapted to retract said latch bolt from either side of saidlock; means for releasing said latch bolt from said deadlocking lever bythe knob mechanism on the inside of said latch; and mechanism foractuating said deadlocking lever from the inside of said latchseparately from said knob mechanism, substantially as described.

4.. In a latch, the combination with a latch bolt; of knob mechanism foractuating said latch bolt from either side of said latch; a deadlockinglever adapted to be swung to or from the path of said latch bolt; keymechanism adapted to actuate said deadlocking lever to either of itspositions and to retract said latch bolt from the outside of said latch;and means adapted to actuate said lever operated by said knob mechanismfrom the inside of said latch, substantially as described.

5. In a latch, the combination with a latch bolt; of knob mechanism foractuating said latch bolt from either side of said latch; a deadlockinglever adapted to be swung to and from the path of said latch bolt; keymechanism adapted to actuate said deadlocking lever from the outside ofsaid latch; and means for releasing said. deadlocking lever actuated bythe rotation of the inside knob, substantially as described.

6. In a latch, the combination with a latch bolt; of a deadlocking leveradapted to be swung to and from the path of said latch bolt, said leverbeing adapted to rest normally in either one or the other of saidpositions; and mechanism for actuating said lever from one of saidpositions to the other from either side of said latch, substantially asdescribed.

7. In a latch, the combination with a latch bolt yieldingly held in itsprotracted position; of knob mechanism for actuating said latch boltfrom either side of said latch; mechanism adapted to deadlock said latchbolt brought into its operative position and released therefrom atwillby key mechanism from the outside of said latch; means on the inside ofsaid latch for bringing said deadlocking mechanism into its operativeposition, and releasingit therefrom at will; and means for releasingsaid deadlocking mechanism upon the rotation of the knob mechanism fromthe inside of said latch, said deadlocking means from its operative 10substantially as described. position; substantially as described.

8. In a latch, the combination with a case, In Witness whereof I havehereunto set of a latch bolt in said case, means in the my hand on the2nd day of December, 1908. case to deadlock said latch bolt, separatemeans at opposite sides of the case to move WILLIAM CARROLL saiddeadlocking means at Will into opera- Witnesses:

tive and inoperative positions, and knob MAY L. OCONNOR,

mechanism at one side of the lock to release WILLIAM A. RICE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

' Washington, D. G.

